Answer:

Step-by-step explanation:
We must write the function of the line in the form 
First calculate the slope m



Then

To have b replaced a point in the function

Finally the function is

The formula for calculating the simple interest is given by

Here, P = Principle amount
r = annual interest rate in decimal
t = time in years.
Now, if we invest for months or week then in order to find the simple interest, we must convert the units in years.
Therefore, d is the correct option.
d) Interest rates are annual, so you must convert the units into years.
Answer:
$0.085 per mile or 8.5 cent per mile
Step-by-step explanation:
We know:
Total expenses = $1837
Gasoline expense = Total expenses - other expenses
= 1837 - 972 - 114 - 105 = $646
Benito drove in total of: 7600 miles
Cost of gasoline per mile = Money spent for gasoline / total miles
= $646 / 7600
= $0.085 per mile or 8.5 cent per mile
Hope this helped :3